Polytheism
Polytheism is the idea of having many gods and therefore worshiping many gods. The Ancient Greeks had a form of this and parts of Rome, the parts that were Greek, adopted those gods and just gave them different names and a more militaristic mind-set and ruling style. The Ancient Sumerians, Egyptians, Taoists, Hindus, Confucinists even had a form of this with all of their gods. In the Foundation time period there were a lot more religions that used the Polytheism and most of those died out, but bigger religions that were able to catch on are still around today. However the "Big 3" religions believe in a monotheistic system. So, this belief has died out as being the "big thing" as it was in the Foundation time period where almost everyone was worshiping multiple gods and being important in a lot of religions, just not the three super powers of religion.
Back in the ancient times the people based their whole society on the gods they worshiped. Those who claimed to be in contact with the Gods were given high places of power or ruled their society.These were mainly priests or people who claimed to be a god in mortal form sent down to rule over the people. In current day society people still say the same things as they did when it first came around. It is one of the few belief systems to have not changed to suit the needs of ruling and getting money.
Back in the ancient times the people based their whole society on the gods they worshiped. Those who claimed to be in contact with the Gods were given high places of power or ruled their society.These were mainly priests or people who claimed to be a god in mortal form sent down to rule over the people. In current day society people still say the same things as they did when it first came around. It is one of the few belief systems to have not changed to suit the needs of ruling and getting money.